Boulder City Weather in September
Average highs run from 103°F on September 1 to 91°F on September 30, and lows from 79°F to 66°F. Normal precipitation for the month is 0.36 in.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 98°F
- Average low
- 73°F
- Precipitation
- 0.36 in
- Record high
- 113°FSep 1, 2022
- Record low
- 53°FSep 22, 2017
- Chance of a freeze
- 0%
- Days of 90°F or more
- 26.2
- Daylight
- 12 h 56 min to 11 h 50 min
- Cloud cover
- 22%
- Humidity
- 24%
- Dew point
- 38°F
- Wind
- 7.6 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 103°F | 79°F | 113°F 2022 | 70°F 2010 | |
| Sep 2 | 103°F | 79°F | 112°F 2022 | 69°F 2023 | |
| Sep 3 | 103°F | 78°F | 111°F 2022 | 71°F 2008 | |
| Sep 4 | 102°F | 78°F | 110°F 2007 | 66°F 2004 | |
| Sep 5 | 102°F | 78°F | 111°F 2022 | 71°F 2013 | |
| Sep 6 | 102°F | 77°F | 111°F 2022 | 69°F 2025 | |
| Sep 7 | 102°F | 77°F | 113°F 2022 | 73°F 2016 | |
| Sep 8 | 101°F | 77°F | 110°F 2021 | 62°F 2013 | |
| Sep 9 | 101°F | 76°F | 109°F 2008 | 65°F 2010 | |
| Sep 10 | 101°F | 76°F | 109°F 2021 | 65°F 2010 | |
| Sep 11 | 100°F | 75°F | 110°F 2026 | 65°F 2010 | |
| Sep 12 | 100°F | 75°F | 110°F 2026 | 60°F 2005 | |
| Sep 13 | 99°F | 74°F | 108°F 2007 | 70°F 2014 | |
| Sep 14 | 99°F | 74°F | 109°F 2007 | 64°F 2022 | |
| Sep 15 | 99°F | 73°F | 106°F 2007 | 60°F 2005 | |
| Sep 16 | 98°F | 73°F | 106°F 2014 | 64°F 2006 | |
| Sep 17 | 98°F | 72°F | 103°F 2021 | 62°F 2024 | |
| Sep 18 | 97°F | 72°F | 106°F 2018 | 63°F 2005 | |
| Sep 19 | 97°F | 71°F | 105°F 2018 | 63°F 2005 | |
| Sep 20 | 96°F | 71°F | 106°F 2009 | 60°F 2004 | |
| Sep 21 | 96°F | 70°F | 105°F 2009 | 61°F 2004 | |
| Sep 22 | 95°F | 70°F | 99°F 2015 | 53°F 2017 | |
| Sep 23 | 95°F | 69°F | 98°F 2014 | 57°F 2006 | |
| Sep 24 | 95°F | 69°F | 100°F 2024 | 54°F 2017 | |
| Sep 25 | 94°F | 68°F | 102°F 2015 | 59°F 2017 | |
| Sep 26 | 94°F | 68°F | 106°F 2015 | 53°F 2006 | |
| Sep 27 | 93°F | 67°F | 105°F 2024 | 63°F 2007 | |
| Sep 28 | 93°F | 67°F | 106°F 2024 | 54°F 2013 | |
| Sep 29 | 92°F | 66°F | 107°F 2024 | 56°F 2013 | |
| Sep 30 | 91°F | 66°F | 106°F 2024 | 57°F 2007 |
Chance of rain
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:11 AM, sunset 7:07 PM
- September 30
- sunrise 6:34 AM, sunset 6:24 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00260125 (Alan Bible Visitor Ctr), public domain. Records: NOAA GHCN-Daily, station USC00260125, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.